Effect of the Fe/Cr molar ratio and calcination temperature on the preparation of black ceramic pigment with stainless steel dust assisted by microwave processing

Li, Zhiqiao; Zhang, Xiang; Ma, Guojun; Zheng, Dingli; Xu, Jie; Xu, Ju

doi:10.1016/j.jclepro.2022.133751

Cited by 6 publications

(4 citation statements)

References 43 publications

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“…The ionic radii of Fe and Cr are 0.55 Å and 0.62 Å, respectively. The insignificant difference between these ionic radii provides the conditions for Fe2O3 and Cr2O3 to form continuous solid solutions [35]. Therefore, Cr on the surface of hematite Fe2O3 easily migrates into the lattice of Fe2O3 by diffusion, replaces Fe, and occupies the iron ion vacancies in the hematite lattice forming (Fe1−xCrx)2O3.…”

Section: Mineral Composition Of the Sintermentioning

confidence: 99%

Understanding Chromium Slag Recycling with Sintering–Ironmaking Processes: Influence of Cr2O3 on the Sinter Microstructure and Mechanical Properties of the Silico–Ferrite of Calcium and Aluminum (SFCA)

Xu,

Ma,

Liu

et al. 2024

Molecules

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Chromium slag is a solid waste of chromium salt production, which contains highly toxic Cr(VI) and significant amounts of valuable metals, such as Fe and Cr. Recycling chromium slag as a raw sintering material in sintering–ironmaking processes can simultaneously reduce toxic Cr(VI) and recover valuable metals. A micro-sintering experiment, compressive strength test, microhardness test, and first-principles calculation are performed to investigate the influence of Cr2O3 on the sintering microstructure and mechanical properties of the silico-ferrite of calcium and aluminum (SFCA) in order to understand the basis of the sintering process with chromium slag addition. The results show that the microstructure of SFCA changes from blocky to interwoven, with further increasing Cr2O3 content from 0 wt% to 3 wt%, and transforms to blocky with Cr2O3 content increasing to 5 wt%. Cr2O3 reacts with Fe2O3 to form (Fe1−xCrx)2O3 (0 ≤ x ≤ 1), which participates in forming SFCA. With the increase in Cr doping concentrations, the hardness of SFCA first decreases and then increases, and the toughness increases. When Cr2O3 content increases from 0 wt% to 3 wt%, the SFCA microhardness decreases and the compressive strength of the sintered sample increases. Further increasing Cr2O3 contents to 5 wt%, the SFCA microhardness increases, and the compressive strength of sintered sample decreases.

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Section: Mineral Composition Of the Sintermentioning

confidence: 99%

Understanding Chromium Slag Recycling with Sintering–Ironmaking Processes: Influence of Cr2O3 on the Sinter Microstructure and Mechanical Properties of the Silico–Ferrite of Calcium and Aluminum (SFCA)

Xu,

Ma,

Liu

et al. 2024

Molecules

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“…Zhang et al [25,31,[97][98][99] utilized stainless steel dust as the raw material and adjusted the material composition using chemical reagents such as Cr 2 O 3 , NiO, and MnO. The adjusted mixture was then prepared as Fe-Cr-Ni-Mn system black ceramic pigments using the microwave roasting process.…”

Section: Ceramic Pigmentsmentioning

confidence: 99%

Valuable Recovery Technology and Resource Utilization of Chromium-Containing Metallurgical Dust and Slag: A Review

Xu,

Liu,

et al. 2023

Metals

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As a type of metallurgical solid waste with a significant output, chromium-containing metallurgical dust and slag are gaining increasing attention. They mainly include stainless steel dust, stainless steel slag, ferrochrome dust, and ferrochrome slag, which contain significant amounts of valuable elements, such as chromium, iron, and zinc, as well as large amounts of toxic substances, such as hexavalent chromium. Achieving the harmless and resourceful comprehensive utilization of chromium-containing metallurgical dust and slag is of great significance to ensuring environmental safety and the sustainable development of resources. This paper outlines the physicochemical properties of stainless steel dust, stainless steel slag, ferrochrome dust, and ferrochrome slag. The current treatment technologies of chromium-containing metallurgical dust and slag by hydrometallurgy, the pyrometallurgical process, and the stabilization/solidification process are introduced. Moreover, the comprehensive utilization of resources of chromium-containing metallurgical dust and slag in the preparation processes of construction materials, glass ceramics, and refractories is elaborated. The aim of this paper is to provide guidance for exploring effective technology to solve the problem of chromium-containing metallurgical dust and slag.

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“…After 30 min, a sample with uniform and excellent performance was obtained, and the coloring performance of the color material was better than that of the cobalt-containing color material sold on the market. Li Zhiqiao 17 prepared black ceramics using Fe 2 O 3 ,Cr 2 O 3 , MnO and NiO as raw materials by solid phase method , the main phases of which are NiFe 2 O 4 ,NiCr 2 O 4 and Ni [Mn 0.5 Cr 1.5 ] O 4 , the color is pure black, and with the increase of the amount of pigment added, the black becomes brighter and has excellent coloring performance, the L * , a * and b * values of the prepared sample are 18.02, 0.20 and 0 respectively. D. Melo 18 and others tried to replace part of Co in lanthanum cobaltate with Ca to reduce the cost.…”

Section: Introductionmentioning

confidence: 99%

Preparation and research of new black zirconia ceramics

Ding,

Wang

2024

Sci Rep

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The existing black zirconia has problems such as uneven color development, poor stability, expensive raw materials, and harm to the human body and the environment. In order to solve the above problems, this paper intends to use NiAl2O4, NiTiO3, Fe2O3 as chromophore, zirconia as a matrix, and a solid-phase method is used to prepare high-performance black zirconia ceramics. The method avoids the introduction of toxic elements, and at the same time, it is more economical in the selection of color-developing pigments. The experimental results show that black zirconia ceramics with uniform color, continuous adjustment and high temperature stability can be obtained. When the sintering temperature is lower than 1450 °C and the color material mixing ratio is 10 wt.%, the mechanical properties and optical properties of the obtained samples optimum, the overall reflectance of the sample is less than 10 wt.%, which meets the conditions for market application. These black ceramics can be widely used in high-tech fields such as mobile phone backplanes, photovoltaic industry and high-end decorative materials, and have broad application prospects.

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Effect of the Fe/Cr molar ratio and calcination temperature on the preparation of black ceramic pigment with stainless steel dust assisted by microwave processing

Cited by 6 publications

References 43 publications

Understanding Chromium Slag Recycling with Sintering–Ironmaking Processes: Influence of Cr2O3 on the Sinter Microstructure and Mechanical Properties of the Silico–Ferrite of Calcium and Aluminum (SFCA)

Understanding Chromium Slag Recycling with Sintering–Ironmaking Processes: Influence of Cr2O3 on the Sinter Microstructure and Mechanical Properties of the Silico–Ferrite of Calcium and Aluminum (SFCA)

Valuable Recovery Technology and Resource Utilization of Chromium-Containing Metallurgical Dust and Slag: A Review

Preparation and research of new black zirconia ceramics

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